Peak values of conductivity in integer and fractional quantum Hall effect

Abstract

The diagonal conductivity σ xx was measured in the Corbino geometry in both integer and fractional quantum Hall effect (QHE). We find that peak values of σ xx are approximately equal for transitions in a wide range of integer filling factors 3 < ν < 16, as expected in scaling theories of QHE. This fact allows us to compare peak values in the integer and fractional regimes within the framework of the law of corresponding states.